Things to know
A CCTV drain survey is a real, billable diagnostic step, not a courtesy thrown in before the "real work" starts. It's what tells you whether a blockage needs simple rodding, high-pressure jetting, or points to a structural problem needing excavation. Pricing it separately, and crediting it against further work if the customer proceeds, reflects the genuine diagnostic value of actually seeing what's wrong before quoting a fix.
Rodding, jetting, and excavation are three different tiers of job, not interchangeable words for "unblocking a drain." Rodding suits a simple, accessible blockage. Jetting clears grease and scale further down the line. Excavation is needed when the pipe itself is damaged or collapsed. Naming which method was used, and why, on the invoice explains the price difference between what looks like "the same job" on paper.
Drain responsibility in the UK isn't always the property owner's. A shared lateral drain serving multiple properties, or a public sewer beyond the boundary, may be the water company's responsibility instead of the customer's. Note where the blockage was found and who is actually liable. This is a genuine, common source of dispute, and getting it right protects both you and the customer from paying for a fix that wasn't theirs to pay for.
Recurring blockages, especially from tree root ingress, are worth flagging as an ongoing issue, not treating each callout as unrelated. A customer who's called you out three times for the same drain deserves an honest note that a repair, not merely repeated clearing, may be the better long-term fix, even if that's a bigger job than the one they called about today.
Typical drainage engineer line items and UK prices
Indicative ranges, excluding VAT. Rates vary by region (London and the South East run higher) and by job size.
| Item | Unit | Typical range |
|---|---|---|
| Blocked drain call-out (incl. first hour) | per visit | £80–£150 |
| High-pressure jetting | per hour | £80–£150 |
| CCTV drain survey + report | per survey | £150–£350 |
| Patch liner repair (no-dig) | per patch | £300–£600 |
| Excavate + replace section of drain | per job | £800–£2,500 |
| Tankering (waste removal) | per load | £250–£500 |
| Out-of-hours emergency | per visit | £150–£250 |
Common drainage engineer jobs and how to price them
- Blockages
- Call-out plus time, with jetting rates per hour after the first.
- CCTV surveys
- Fixed price per survey, with report and footage; often for buyers or insurers.
- No-dig repairs
- Per patch or per metre of lining, after a survey.
- Excavation repairs
- Fixed price after survey, with reinstatement of surfaces itemised.
Regulations and certificates to reference
- Private sewer transfer (2011) — since October 2011, in England and Wales, shared drains and lateral drains outside a property’s boundary are generally the water company’s responsibility. Say on the invoice which section the fault was in — the customer may not have to pay for that part.
- Building Regulations Part H — new drainage, or altering an existing drain, is notifiable; building over or near a public sewer needs a build-over agreement from the water company.
- Waste carrier registration — tankering waste or removing silt and debris requires registration as a waste carrier, usually upper tier.
- CCTV survey reporting — surveys are usually coded to the WRc Manual of Sewer Condition Classification (MSCC). Quote the reporting format, and supply the footage and report.
Payment terms drainage engineers commonly use
- Domestic: payment on completion.
- Insurance work: invoice the policyholder with survey report; some insurers pay directly on approval.
- Agents and landlords: 14–30 days.
Read more: Invoice payment terms explained · Payment methods to offer clients
VAT and CIS for drainage engineers
VAT
Drain clearance and repairs are standard-rated at 20% once you are VAT-registered.
Construction Industry Scheme (CIS)
New drainage installation on a construction project is a construction operation, so a contractor deducts CIS from your labour.
Repairing, servicing or maintaining drains — including unblocking and jetting — is specifically excluded from CIS, even when the customer is a builder.
General guidance, not tax advice — check your position with HMRC or an accountant.
Read more: Do I need to charge VAT on my invoices? · What must an invoice include? (UK legal requirements)
What this template includes
- CCTV drain survey priced as its own diagnostic step
- Jetting, rodding, or excavation tiered by method
- Shared/private drain responsibility noted
- Root ingress or recurring issue flagged
- PDF download or shareable tracked link
Full guide
How to Start a Drainage Business as a Sole Trader
Frequently asked questions
In England and Wales, since 2011, drains shared with neighbours, and lateral drains outside the property boundary, are generally the water company’s responsibility. The survey report should show where the fault is.
It shows the cause of repeated blockages, such as root ingress, displaced joints or collapse. It also tells you whether a repair can be no-dig or needs excavation, and insurers often require it before approving a claim.
Like-for-like repairs usually do not, but new drains or significant alterations are notifiable under Part H. Building over a public sewer needs water company consent.
Per hour suits blockages of unknown cause. Per job suits planned maintenance runs. Put the first-hour charge on the quote either way.
It's a genuine diagnostic step that determines whether a simple rod, jetting, or excavation is needed. Pricing it separately reflects real diagnostic value, and it's often credited against further work.
Not always — a shared lateral drain or public sewer beyond the boundary may be the water company's responsibility. This should be identified and stated on the invoice.
Often tree root ingress or an underlying pipe issue. If a drain has been cleared repeatedly, a proper repair is usually worth flagging as the better long-term fix.
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